From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, cnliou(at)eurosport(dot)com, pgsql-general(at)postgresql(dot)org |
Subject: | Re: What Is The Firing Order? |
Date: | 2001-09-07 20:01:46 |
Message-ID: | 200109072001.f87K1kv20378@candle.pha.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
> > That seems fairly arbitrary; someone else might wish the opposite,
> > depending on the details of what they want to do.
>
> We should probably check first whether the SQL standard has anything to
> say about the relative ordering of foreign key cascade actions versus
> triggers. (I would tend to think that triggers come after FK actions.
> However, things might get tricky when cascade actions fire triggers of
> their own.)
>
> The order of execution of "pure" triggers meanwhile is defined thus:
>
> The order of execution of a set of triggers is ascending by value
> of their timestamp of creation in their descriptors, such that the
> oldest trigger executes first. If one or more triggers have the
> same timestamp value, then their relative order of execution is
> implementation-defined. [4.35]
>
> This is probably what happens in practice anyway, so it might make sense
> to follow this rule.
Yep, that would be a pretty strong vote for OID order.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
From | Date | Subject | |
---|---|---|---|
Next Message | Alex Pilosov | 2001-09-07 20:03:59 | Re: moving char() to varchar() |
Previous Message | Brent R. Matzelle | 2001-09-07 19:54:58 | Re: moving char() to varchar() |